Measure area to determine how much tile you will need.  To ensure that you have enough to finish the job, add on an additional 15% of tile.
If laying tile on concrete or wood, ensure the surface is even or level by using a self-leveling compound.
Use backerboard sheets when laying tiles over wood or uneven surfaces.
Find your centerpoint and snap chalk lines to create your perpendicular starting point.
Spread adhesive by pressing the mortar into the backerboard or cement with a trowel at the appropriate angle. Comb it out into straight lines, holding a trowel at a 45-degree angle to the floor and pushing the trowel teeth into the floor.
Lift the first tile and check the mortar on its back. Dry areas mean the mortar needs to be scraped and reapplied. Set the remaining tiles by butting edge against edge.  
Place spacers on ends so you can easily remove them. Cut tile as needed, using a tile cutter or tile saw.
Mix the grout and spread it in sweeping arcs with a rubber grout float.  Press the grout into joints, filling them completely.  Remove the excess.
Wipe the tiles with a damp sponge to remove excess residue and remove the haze immediately.
Damp cure the grout by misting it twice a day and apply tile and grout cleaner with a sponge.
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